Your question is completely inane.

Who needs a "Cop Killer" type car?

Why does anyone need a "cop Killer" type sword?

Ad nauseum.

There is no such thing as a "cop killer" gun. Been in lots of gun stores, never saw one.

There is not such thing as a "cop killer" bullet.

Again, been in lots of gun stores, never saw one.

There's no answer to your question, ES, as the question itself is nothing more than a play on emotion having nothing to do with reality.

That having been said, Why in hell does every thread about a shooting wind up with the same people over and over again bitching and moaning about gun control?

There's a politics thread, have your pissing contests in there.